thanks for posting. i believe we heard that question and it was answered during the recent FAA webinar where they confirmed that the 107 pilot can fly recreationally as long as the pilot followed all the rules. all the rules are 107 rules plus recreational rules. when they said you can't pick and choose, i took that to mean the 107 pilot cannot fly recreational and thus skip the 107 rules and then fly 107 and skip the recreational rules (as one example); that would be picking and choosing (the latter in and of itself is fine because flying recreationally is an exemption). conversely, the recreational pilot flys only under the recreational rules (ie cannot fly commercially).
it was also said the 107 pilot may or may not have to take the recreational test in order to fly recreationally (not a big deal) but i guess it's leaning towards more likely than not based on someone of the more recent replies.
anyway, none of this is my own, the faa or someone else said it, i'm just repeating it. therefore, i'm not taking "questions" on it; thanks. make what you will of it. who knows, i still could be wrong. in an earlier thread, i've already admitted that i was wrong when i insisted that 107 pilots cannot fly under the recreational rules. clearly they can.