No
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They can do, it depends on the shoes and possibly the rider. I wrecked a nice pair of Clarkes loafers, have taken some chunks out of my safety shoes, yet my relatively smooth looking Pearl Izumi X-Alp have both the best grip and are most immune from damage. These are the only three shoes I've used with this sort of pedal, so not a comprehensive review.
A fairly recent study of pro cyclists, showed that the power advantage had been overestimated, I haven't seen the full findings, just a couple of summaries. I have noticed a growing trend for endurance racers to use flats.I do appreciate the better control/power.
Not sure that's quite a flat 'no' really. It depends on what someone considers 'wreck' as! I use V8 copies on my utility bike and I can certainly see the damage to the soles of some of my shoes where the pins dig in as a tell tale ring (ish) of marks/cuts. I don't mind it, ultimately the pins are only 2-3mm in length so if the sole is that far away from leaking then it's a set of shoes that are close to done anyway. I'd far rather have the much better grip in wet weather that the pins provide than that of plastic/rubber pedals.
They certainly can. I've gone through a few pairs of cheap sandals that pins chewed holes through, turning my soles into sponges when walking on wet ground. And eventually my 5/10s got really mangled too. I do spend a lot of time standing on the pedals and it's hilly around here so that doesn't help.
Yep, 'getting shinned' is a real thing as the cuts on my right shin currently testify. However, I don't believe it's a risk when you're riding normally - you're only going to come off your pedals like that when you're doing something particularly dynamic, and even then it usually only happens when you're learning (E.g. trying to learn high bunny hops is what's bitten me a couple of times recently.) It's really not as bad as its made out to be though - I could wear shin pads whilst I'm practicing tricks, but the consequences of getting shinned just aren't bad enough for me to bother.