You should be safe. I haven't had any issues with being banned on HEN at all. I did however get banned on another console with DEX CFW on it, so I switched back to CEX and have been safe since. If you're worried about it and have webman installed, before you login to PSN hold R2 and then tap and hold triangle for a second or two. (If you play games from HDD mount them first! Lol) Then you should be safe.
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