Q. I like to try to make shiduchim. I’m on an email list that gives me many shiduch profiles a day. Some of these people are modern orthodox. Some of them are not shomer nagiya. One question is, if I know someone is not shomer nagiya, am I allowed to set them up with anyone? And secondly, if someone says they’re modern orthodox, am I mechuyav to ask if they are shomer nagiya? In general, would I be allowed to set up people who are modern orthodox, being that they may do inappropriate things on the date? Or is it not my shaila?
Thank you in advance for your response. 

A. Please refer to question 257 on this forum hereby quoted:
Is it permissible to arrange a shidduch if it is possible that the couple isn’t religious enough to keep Taharas Hamishpacha? A. Many Poskim maintain that there is no prohibition on arranging, helping or being mesader kidushin (performing the wedding ceremony) of a couple that does not observe taharas hamishpacha (family purity laws). Many require that the couple should commit to at least go once, prior to the marriage to the mikvah. (Minchas Yitzchok 1,10 – Chelkas Yaakov 1, 23 – Sridey Eish 2, 57 and 3, 28 – Hapardes year 13 vol. 5,7, 11 and year 23 vol.1 – Hilel Oimer Y.D. 67 – Hashavit Y.D. p.167).
See also question 799 in regards to buying insect contaminated raspberries for a disabled neighbour and question 989 on administering an oath to someone who is lying.
Horav Shlomo Miller’s Shlit”a opinion is that you don’t have to be concerned on what the individuals may do during the date.

Rabbi A. Bartfeld as revised by Horav Shlomo Miller Shlit’a