I think there's a greater argument behind all this.
Simply put, the people who build these square towns with a glass roofs, who region them, and hide in them are simply seeing the use of TNT to break into their walls as easy raiding.
I understand that, you just want to be left alone in your little glass house. That's fine and all, but I think you're missing what Hercraft is striving for when it comes to gameplay. I miss the older Maps where raiding was a legit concern, over this "oh well we'll just region off this town and hide all day" attitude. It takes away from what Herocraft is, at least in my opinion, a fantasy simulator. Where people can choose to form towns, people can choose to be bandits, bankers, warriors, ect. But the one thing that is majorly lacking now, the sense of constant danger. Hell, I'm not even really afraid to just go wondering down the main roads or through the wilderness anymore. What happened to the EVE online feel of low-null sec that I would always get as I keep my head on a swivel and grind mobs.
I don't even bother with PVP anymore because all everyone wants to do is hide in their ugly square glass houses. (Would be great if we could ban having a roof over towns but hey might be a bit much)
Nothing I make is Impenetrable, I do it on purpose so that when people come raiding, I know what routes they think they can take, but also leave them vulnerable. And for those who think they can get away with no strategy at all, are simply missing the point of playing on this server. Its not for building alone, nor is it really for PVP alone. Its a combination and it needs to stay that way. Yet atm, it feels super carebear and everything is made up so people can just build and mine without a damn care in the world, while people who PVP just start getting frustrated. While being reduced to just name calling and bitching. The whole while, people who just build bitch about PVP.
Now, as for the TNT issue, awesome Idea. People with no imagination obviously cant see past the whole "they are going to take my shit and make me cry attitude". Simply, get LWC if you are a town, you have enough members to store enough resources in those that it shouldn't even be a thought, hell with just me and my 3 friends i can store enough to keep us supplied forever.
It will also give a use for the miner class other than just extra resources. It will make it so that people can actually get into towns for once, and maybe actually look at the inside at what people are actually building. (If people want to build be proud of it at least and want others to see)
How TNT should work is really simple imho.
Only Miners can place them. 1 min CD (Larger blast radius)
Breaks through any block type, if you can make it so that chests and such just disappear for the duration so that nothing is lost in the blast would be great.
The hole should last 5 Min, enough for people to get in, retreat and go back if they want. (If you dont think it should last that long, obviously you should go look at the world around you, walls that get blown up take awhile to fix -.-)
Townhall, for those who really want to hide should be immune to TNT.
Thats it, nothing more, nothing less. Dont see how it can be bad for anyone....not like if you're on you can hear TNT going off anyways to give you time to run and hide..oh wait you can.
Not like they should beable to take anything important if you have an LWC.