Whenever I visit Facebook now, I get the following message or suspension warning
(note the link is from someone else's instagram account posted on reddit and I only link to it because it's the complete warning at a glance)
Most VPNs use a specific subset of IP addresses. Many bad actors utilize VPNs to obfuscate the origin of the malicious activity, which kind of poisons the well, so to speak.
Like what I'm using mulvad VPN, a bunch of sites will flag me as potentially suspicious traffic. This is, no doubt, because mulvad VPN is a legit VPN, so bad actors are using it, because they know they can get away with it.
I can confirm I have already some experience with the fact of VPN usage being flagged as a high change of automated traffic (except it was TOR, which is pretty much identical in this context).
Discord put me a wealth of captcha, Wikipedia refused edition of pages (even with my account. Which IMO looks like an oversight). And many pages just had captchas even when not trying to log-in.
I got the same message with uBlock. The site also goes apeshit in some places because I assume it tries to circumvent my adblocker by changing classes in the dom. Either way - at this point I don’t care any more.