This would become an interesting T tester, people might KOS you for walking through them.
Custom Stats How about highlighting the tripmines instead? That could avoid any accidents someone might have, both in dying and accidentially walking through one for an observant eye to catch them.
I think that this would be better than it is right now. True they could kill you for walking through it but it's better than instantly dying and the other person getting lower karma (I'm not sure if they do, but I think so). The highlighting thing could also work I guess, but I think it would be a tad bit annoying to see a lassers across the map or through walls. Somtimes people make really long tripmines and I think that would just be cancer to see through walls. I don't know it might still work as an alternative.