illegitimate CHILD

Hye guys...
i want to discuss about a sub-topic on the effect of baby dumping that is actually happen on the baby him/herself.As all of us know, the baby that alive will be taken by the "jabatan kebajikan masyarakat" or some couple that doesn't had their own baby as an adopted child. although they will get an adopt parents...they still could not be provent as a legal child (in islam). so, guys...do you think that they will be accept by the society in the future..and this will become a big issue when they want to get married soon. Do their girlfriends's family accept them as their own family if they know his past history??....

i hope all of you might give an opinion on this sub topic...a bit hot topic here...
thanks..