It's much easier to check the credentials of the relatively few people who offer such services. For the above example, you'd find that the Stonehenge people [1]

It's much easier to check the credentials of the relatively few people who offer such services. For the above example, you'd find that the Stonehenge people [1] have a long history of contributions to Perl and an excellent reputation. [1] http://www.stonehenge.com/staff.html http://www.stonehenge.com/staff.html