There are a number of entities which keep track of registrars which have a disproportionate incidence of things in which the entity has an interest. Without either endorsing or criticizing any particular of these "watchdog" type outfits, you can find registrar rankings by, say LegitScript in relation to what they perceive as rogue pharmacies, Spamhaus keeps a "top ten" list of registrars that are used by spammers:
etc.. Spamhaus uses a "badness index" that is normalized to domains under management. Certainly, if you are doing numeric compilations, you would expect GoDaddy to have the highest raw score of (insert "bad thing" here). But if GoDaddy has 10 "bad thing" names to Registrar X's 1 "bad thing" name, but GoDaddy has 100 more domains than Registrar X, then Registrar X has a higher incidence of that "bad thing".
Everyone in the industry keeps something of a running ledger of "what domain registrars are most likely to be utilized by domain thieves". I personally have noticed that I get regular SMS phishing messages using .info domain names which follow a pattern and are remarkably and consistently registered with one registrar.
Over the long term, if a registrar is attracting a disproportionate share of pathological customers, then there can be instability issues. One notorious registrar was disaccredited by ICANN a while back (they may be still arguing in court after a default), so, to any legitimate customers of theirs were adversely impacted by the large volume of abuse upon which they didn't act. But those also involve narrowly defined consensus categories of abuse.
So, registrar responsiveness to certain types of abusive registrants, as ranked by whomever you might trust on things like spam, phishing, child abuse imagery, etc., is worth taking into account in selecting a registrar.