Totalmente de acuerdo contigo RBZ.
Además, traigo a cuento info desde el sitio NONOFOLLOW.NET
Cita: 11 Reasons against nofollow
1. nofollow does not prevent comment spam
2. nofollow is confusingly named
3. nofollow harms the connections between web sites
4. nofollow is not useful for humans, just for search engines using PageRank or a similar technique
5. nofollow could be used to shut web sites out
6. nofollow discriminates legitimate users as spammers
7. nofollow heists commentators’ earned attention
8. nofollow could be used to further discriminate weblogs<
9. nofollow prevents the Web from being a web
10. nofollow eliminates the dissemination of free speech
11. nofollow was developed in privacy with only search engines companies taking part in the discussion
Fuente:
http://nonofollow.net/11-reasons-against-nofollow/