From a legal perspective I can understand such a wording, but I wonder why an engineer simply tells a (non-paying) customer that he violates the ToS, without th

From a legal perspective I can understand such a wording, but I wonder why an engineer simply tells a (non-paying) customer that he violates the ToS, without thinking about it. I mean, one could simply wrap the content in a HTML body and change the extension, but that would actually increase the data load for no good reason. So it is complete non-sense to complain about txt files being served.