I'm doing a research for my masters degree and I found in a facebook a group of people (about 400 of them) that would be perfect to ask to fill my questionnaire. What I'm concerned about, is if I get marked as a spammer by facebook if I try sending 400 same messages to different people on facebook. Is that really an issue? What can I do to prevent myself from being banned? Maybe if I send those messages in small bulks every day (like 20 of them each day) I won't get flagged?
closed as off topic by Canadian Luke, Mike Fitzpatrick, Sathya♦ Jan 8 at 8:19
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I'm not a Facebook expert at all, but: