I have not observed a whole lot of drunken people falling on tents. Or any, actually. I've heard precisely one tale of it happening, secondhand between friends, but it's not something that one should generally expect.
Burning Man does not support a culture of tent-vandalization. *grin*
Illuminating your guy lines with light strings, glow bracelets, solar lights, etc--and leaving a bit of walking space between tents, but not such huge holes in your camp that people constantly cut through--goes a long way toward avoiding accidents. So does topping your rebar with plastic pop bottles, tennis balls, or Barbie doll heads. If you don't cushion your rebar, well--I'll meet you in the med tent.
No one can promise you that the tent will come home unscathed. I would say . . . talk to your mother and find out how great the sentimental value is (if there's any). If it's sturdy and you use 10 inch stakes or rebar, here's a pretty good chance it'll come home just fine, if very dusty. Whether you'll want to wash it or just keep it for playa use (or both) is up to you. I used one cheap dome tent for the years 2000, 2001, 2003 and 2008. I treated myself to a new $120 tent for 2009, and used it in 2010, 2011 and will use it again in 2012. I don't have a yard, so I don't bother washing them.
If you can stand up in it, that's a point in its favor. After a few days, having a tent in which you can stand fully is such a nicety.
(If it has a lot of unprotected, uncloseable mesh and you don't want to sew things over it, that is a point against it.)