Suggestion: killing spam posts

For someone unknown reason, the COW Forum attracts a remarkable amount of spam advertising (mostly online video streaming for European sports, but also reports of western universities in Chinese and admissions testing prep classes). The volume of spam is so bad that it periodically chokes the reporting of "hot threads" and "latest posts" so that no real Forum members can actually tell what's going on without going to each individual sub-forum subject area. It's annoying. Given their limited audience, why these idiots are posting their spam here is also something of a mystery.

Because most of the spam posters eventually get banned, the Forum accounts that are posting the spam are inevitably newly-created accounts with names like "Asdfjkl" and "gfghkjkljkjk" and other repeating characters which make them easy to identify.

Here's a suggestion to stop this low-level disruption of the Forum: because almost 100% of the spam posts include outside links, how about we create a block for all posts with external links (i.e., non-COW web addresses) for new accounts until the account reaches some minimum number of posts (say, 20 or 25). That should eliminate the spam problem at virtually no cost to legitimate new Forum members . . . .