|Yes, it is perfectly possible, simply remove the extra coding before posting. If the poster contacts you to ask why the extra bits were removed just tell him it was done automatically by your system as it looked suspicious, then it's up to him to tell you what the extra stuff is. If he doesn't say anything then you haven't got a problem.|
I maintain a few blogs for individuals and organisations. It's amazing the number and sort of potential comments I have to weed out that have dubious links and obvious scamware in them. Generally speaking, unless the person attempting to post can tell me what and why they are trying to post them it is not approved for posting at all - I always err on the side of safety. If the poster comes back (which they rarely do) and explains more then I will download & scan any attachments before posting them.
"I've always been mad, I know I've been mad, like the most of us..." Pink Floyd