I'd say it would be cool. So even noobs like me have a chance for looting something usefull from them. I'm not even talking about all these uber armors they are supposed to drop according to Entropedia, can live without, but some usefull L stuff, like guns and armors caould do
On the other side spiders were always rather uber mob, so placing somewhere youngs and similar will ruin this picture. But hunting small spiders is a blast, true. This would add me interesting mob to solo from time to time.