I am an American and am in complete agreement on this point RTFM and related terms like WTF and maybe even FUBAR seem to me to be lower level cuss words more of a moderate swear word less than a full blown offensive cursing Although some pepople react very negatively to these terms my thoroughly uneducated guess is that those people would also react negatively to the more moderate alternative terms like flaming frigging freaking etc and thus the use of fucking here overstates the strength of the term RTFM