What are some signs that a therapist may have poor boundaries with their clients?

Sense of competition with persons who are important in the client’s life.

Struggling with fantasies of deeper connections with clients, whether sexual or parental or other intense or intimate relationships beyond psychotherapy.

Routinely going over the time limit with certain patients, compromising the time for the next client.

Why is the French way to say please is "S'il te plaît" and not "Pour Favour" like Spanish and Portuguese "Per Favor" and Italian "Per Favore" in the Romance languages group?

Obsessing about clients outside of work hours.

Off the top of my ancient head:

Session-expressed curiosities about client details not relevant to the therapy.

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These items can happen fleetingly, briefly, in any therapy, but if they’re frequent, it’s definitely time for the therapist to get some good, solid supervision/consultation.

General Introduction to Boundaries from Panahi Counseling:

Serious disappointment when the client cancels a session.

What made you feel disgusted today?

Failing to mention the client in supervision/consultation, out of fear the supervisor/consultant will advise return to ordinary healthy boundaries.

Frequent phoning or texting of clients to “check up on them and make sure they’re OK.”

Disclosing feelings, fantasies, and experiences to the client in ways not related to the work the client is engaged in.

I am interested in gang stalking tactics. How do covert agents use street theater and false narratives to torment targeted individuals?

Eager anticipation (or anxious anticipation) of the next session in ways that distract.