All gigs disabled ONLY if they violate fiverr TOS. Some of them might be disabled after few months because sometimes it takes time for fiverr to find those gigs as thousands of new gigs created every day.
yes, people can report your gig but fiverr wouldn’t disable your gigs if they don’t violate any rules. And of course if fiverr will find out after the report that you indeed violated TOS then of course they will disable that gig.
No matter how many 5 star reviews seller has. If he violated TOS then his gig will be removed anyway.
I would suggest to filter info/stories like that because of those sellers usually one just to complain without telling the full story and the reason why fiverr denied their gig. (If they say they don’t know then it’s a lie, fiverr always sends an email with explanation as for why your gig was removed)
As long as I’ve been on this forum I remember only one or two stories from all of them where it wasn’t the fault of the seller and their gigs was restored at the end. All other sellers indeed violated fiverr TOS