Generally the answer is a good firm but polite "No". I too have heard my guitars played by stellar players but they're in the minority. If someone is offended and considers me a prick then so be it. I will hand my guitar to a trusted player, but even one of my closest friends is so clumsy I won't trust him with it.

Most often the culprit is alcohol, crowdedness, roudiness, but I don't take any chances outside of my own home.

Peace, Mooh.