I have thought about doing Ancestry.com, 23 and Me, that sort of thing. Maybe it would be interesting to find out if my ethnic heritage is what my family has always told me.
But one of my friends said it is a very bad idea, once they have your genetics on file there could be repercussions or it could be used against you by government, insurances, you might find out the man who raised you is not your biological father. One lady on Megan Kelley found out her mother was really black, she had turned her back on her family, her heritage and passed as white.
Is sending a testube and swab of saliva going to really open a can of worms I won't be able to control?

My husband and I did Ancestry dna. We chose it specifically rather than 23andMe because it doesn't return information about genetic medical conditions. Canada is (or was at the time, it may have changed since) the only G7 country that doesn't offer protections for foreknowledge of genetic conditions... so if I were to find out about some big bad illness likely in my future, it could affect my ability to get or retain life insurance, etc.

I did Ancestry. My mom also tested. It was accurate in terms of family matches. My mom matches as my mom. My dad didn't test but his younger sister and his elderly uncle both did. My aunt and great uncle are both close matches so my dad is clearly my dad.

Ethnicity percentages are a little iffy and Ancestry changes them a lot with updates. Right now I have some French and Norwegian percentages that don't match with having a mom who is primarily German and Irish and a dad whose family was mostly British.