honestly there is a lot of possibility to make repair difficult or impossible, use orb of spider their cadaver will make impossible rebuild, player killing himself, his cadaver will make impossible rebuild, use of acid arrow, smoke arrow etc etc. and if you are solo and that 3 or 4 people attack you, you can try to repair as you want but in front of people that have over 1000 bombs and 3000 arrows due to the broken game balance, well good luck to repair.

offline raiding is not a matter of people repairing, its more linked to other reasons (skill of raider, or event in worst case they don’t want to be recorded in what they do and use if you see what i means)