nobody is prevented in doing the route, but you'd have to rap the route, strip the gear, lead the route, and if you were nice, replace the gear. PITA!!!
Where I climb nowadays (also an area with very strict trad ethics) the 5.12's (depending on if it is popular or not) will get led between once to maybe 9 times on a weekend, and I deal with having to move peoples raplines because they throw them down on the route I'm doing all the times. You don't know, and its not right to disrupt other peoples experiences.