under the letter of the TOS they're bannable due to parders being third party applications.

However, as they're mostly benign and practically undetectable, the general spirit of the law is 'don't abuse others with them', and 'don't ask, don't tell'. Personally, i don't find parsers as useful as people like to make out, they're hard numbers sure, but you don't need those hard numbers if you know your team well enough. Help everyone improve together, instead of singling out those who didn't do quite as well and telling them exactly how bad they performed.