Only mildly so. This hides from the server the fact that you are not checking what is received, so prevents the server from adapting its results based on that,

Only mildly so. This hides from the server the fact that you are not checking what is received, so prevents the server from adapting its results based on that, but still allows a server to just unconditionally serve a malicious script. The safe way is to save to a file, actually inspect the file to make sure there is nothing malicious in there, then run that file.