Can you get banned for using a script executor (such as Synapse) to develop your own anti-exploits?

I remember seeing a ban message for 4-7 days for somebody being banned for exploiting. However, the moderator added a message similar to this:
“We understand that this is for non-malicious use, but it is still against ToS.”
This was because they were making an anti exploit.

Unfortunatly I don’t remember where I saw this.