I seldom post, but when I see/feel the need...
To the crew who believed it necessary to inform another crew of a potentially dangerous situation, "Thank You".
Whether it "was" actually dangerous( sufficient snow? ) or not, I will leave that up to the PIC, but, don't we all not have an obligation to each other- not to mention the flying public- to look out for one-another.
If I saw what was described, I would do the same. If I did not, and God forbid, an accident occurred, I would have a hard time living with myself.
I hope when I'm flying, and one of You see something that in you opinion needs to be brought to my attention, I pray I have the common courtesy to thank you, whether I find it has merit or not.