That's I quandary I've not encountered, but definitely needs some careful consideration.
If I got a pedal with fuzzy side on the pedal, I would be very concerned and likely think about what other anti-social degeneracy the previous owner was involved in.
I mean, if they're operating in a mindset responsible for that, what else were they up to? Treason, private islands, bodies in a crawl space? Did they involve this fuzz velcro pedal in pedal orgies with dirty Mike and the boys?
To say I'd be cautious is an understatement. Only in cases where I saved a large amount of money on the used pedal would I consider keeping the pedal, talking like $20 saving type deal.
Apologies to any normal guitar playing human that does hook side on the board. My concerns are likely too monolithic, but I'm just protective of my totally rational value system.
I hope it goes without saying, but just in case anyone reads that and takes it seriously, it was satire and me trying (poorly) to be funny.