Long time lurker, first time poster...(btw, thanks disboards for the awesome information over the years!)
- I answered "No" because the OP's question ("Is it okay to have a person join the line after getting FPs elsewhere?") implies two things: 1. the individual was never in line in the first place; & 2. the reason for joining the line is not due to an emergency but to collect FPs. Both of these things don't seem fair to the people waiting in line.
- I would have answered "Yes" if the question was "Is it okay to have a person re-join the line after an emergency?" I realize "emergency" is up to interpretation, but at least in this situation: 1. the individual was waiting in line most of the time like everyone else; & 2. an emergency would be unexpected, not for personal gain (FPs), & not a regular practice.
It seemed like several comments were about this second question (e.g. needing to take a toddler to the restroom), so just wanted to point out that the OP's question was specifically about getting FPs & then joining their group in line. While we usually don't know why people are joining the line, in this hypothetical case, we actually do know that it's because the person was getting FPs.