I don't think you can or will be DQ'd for it. I know of no rule
that forbids people who know each other from cycling and running
near one another in the manner that you mentioned. I'm sure it's done
all the time with the 14 to 16 hour crowd.

I think it would be very hard to enforce a rule
against this since the officials would have to know
who knows who and study hours of video to establish
that they were near to each other.

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Find out what it is in life that you don't do well, then don't
do that thing.