I’m surprised to see no one talking about the explosives placement glitch (unless those posts have been deleted?). The bug is executed by placing bombs through ceiling tiles and closed doors, doing damage to a building from the inside. I don’t actually know how to reproduce it myself but have video of it happening to me and have seen other videos of it online. Here is one example of the ceiling being glitched (this isn’t my video): https://www.youtube.com/watch?v=r4E7xbN2eAM
Edit: Just to clarify. This is an active bug. I saw it executed last night through doors. Have video of it going ceilings, and i know it can be done to hatches as well. Very frustrating to defend against, raiders can be very far from placement location (like in the video linked above).
The only proper defense I’ve found against the glitch is to put foundations on top of ceilings. On my server the 2 clans that use this glitch to raid can’t seem to get the explosives through both a ceiling tile and foundation. Instead of a door on the door frames we now put foundation infront of main entrences and instead of hatches on hanging bases we set two Foundations in the hole we drop down to force them to at least raid legit. Expensive to keep clogging the base everytime, but worth it in the long run to prevent the base from being raided.