It's not that big of a deal, but it's still pretty annoying. I let it go when it's a one-time accident. If the same person keeps doing it, acciental or not, I'll give them a look or say something about paying attention or knocking it off.
18 Snoplanks Asym Fish . 18 US Orbit . 18 Arbor Terrapin . 17 Lib x Lost Mayhem Short Fat . 17 NS Maverix . 17 NS Twenty Five . 16 NS Swift - 14 TJ Brand Retro Fish
17 Rome Katana . 17 Burton Malavita Wing . 16 Burton Genesis X
16 Flow Talon