I've had a little time now to read through your stats Art,
Art said:
Yes, 31% of people (including all sexualities) report being bullied at school which is far less than the 67 - 75% of gay people who suffered. If you removed the gay people from the sample the percentage difference of hetrosexual victims to gay victims would be even greater. http://www.nspcc.org.uk/Inform/resourcesforprofessionals/Statistics/KeyCPStats/10_wda48744.html
From your earlier http://www.stonewall.org.uk/education_for_all/research/1731.asp":
Research carried out in 2003 found that 51% of gay men and 30% of lesbians reported being bullied physically at school, compared with 47% of heterosexual men and 20% of heterosexual women.
There is still an increase between homosexuals and heteros, but not nearly as drastic as the 31% vs. 75% you get by comparing the two different sources. What's more, assuming approximately equal numbers of men and women, the statistics from your earlier link claim that about 34% of heterosexuals experience
physical bullying, as compared to your later link's claim of 31% for all forms of bullying. Clearly no conclusions can be drawn from the comparison. I would imagine the studies used in your earlier link had a much looser definition of bullying than your later one. So the difference between bullying between heteros and homos is probably on the order of 10-20%, rather than the 35-45% you were claiming (no direct comparison of all forms of bullying is given, this is just a guess on my part). That being said, there is still an increase in bullying between the two groups, and it must be taken into account when deciding about adoption (the well being of the children should be the first consideration, not the rights of the parents-to-be, we agree on that much Art).
Also from your earlier source:
Seven in ten gay pupils have never been taught about lesbian and gay people or seen lesbian and gay issues addressed in class
Lesbian and gay pupils who have been taught about gay issues are 13 per cent less likely to experience homophobic bullying
So it seems from this that providing an education about gay issues would reduce the difference from 10-20% to under 10%, further, if this statistic holds if the education is given at home as well as at school, then proper parenting could do this, without the burden on the school system (and conservative parents complaining about their children being taught about homosexuality). Given the alternative of the child being raised in foster homes, I think a <10% increase in can be considered to be in the child's best interests.
And finally, this entire discussion is a red herring, since the statistics are for gay or lesbian children, and not for children of gay or lesbian parents. It could be argued that children of gay or lesbian parents are more likely to be gay or lesbian themselves, and that may be, but again since that would only be a fraction of cases, then you will only have a fraction of a <10% increase in bullying to worry about.