No to custom textures
If there is an ability to turn them off and its off by default, why even bother? No one will turn them on, since many people will add stupid and/or offensive crap on their mechs, or they'll paint their mechs with certain color schemes to make them harder to spot on certain maps. I'll personally have it turned off and kept off.....but I guess the devs can add it for people that really, really, really want it....
This kind of negative attitude of "Let's not do this because this will happen" is the reason why we don't have nice or new things and stuck with what's already been done or "safe".
Yes, it's going to eventually happen like that but a LOT of people want it for more then something childish or retarded as that. Some of us really want to be able to customize something as simple as the paint and decals. =/