So, has any WT guy/gal out there fought against someone who likes to utilize standing grappling techniques/holds? I have no idea whether or not they could be able to apply such a technique when they are eating punches so fast and fighting for their balance, but the thought occurred to me whilst watching some videos a friend sent me, she's rather into grappling or at least has studied it a bit, and yeah.. I was curious if that is a threat to us, or perhaps what do you fine folks deem WC/WT's biggest threat to be if any?

A lot of the videos I saw would require so it seemed to me, and I am a complete novice but.. seems like you'd need a willing member to fully be able to apply some of the stuff, but.. like I said i'm a novice! thanks in advance!
Hmmmm... Chain punching whilst in a Muay Thai clinch, for example, could be tricky, you can argue that you're raining punches on them, but you may well be eating knees and elbows galore. Be careful mate. I'm skeptical about "anti-grappling", you can certainly use the chain punching as a bridge into gaining contact, what you do then presents you with a multitude of options.
Certain techniques designed to
keep you from going on the deck are of use, such as the sprawl, if you practice them, perhaps practice with someone who's an experienced grappler, so they know all the little tricks, and the better prepared you are to face them, the better your odds of winning.
Even then, practising the sprawl, is no guarantee that you won't get taken to the deck.
Wing Chuns biggest threat in my view are some of the people who practice it and INSIST that it's all encompassing and can defeat everything and anything, anytime, any place. So long as that time and place ISN'T the octagon or ring. This will likely rub a few people up the wrong way, so let me make this clear. I "
LOVE" Wing Chun. I really do. It's "my" art. My base art, and I think about it, the forms, techniques, how I might use it in a SD scenario on a very regular basis. However, I recognise the validity in improving my knowledge and am not so closeminded or myopic to think that WC is not without its limitations. My advice would be to retain a very open mind, and train with as many guys/gals from as many backgrounds as you can, and pick up as many tips/techniques as you can. If there's something you like in particular, perhaps train that as a secondary art. It's your choice, but the moment I find a decent grappling class in my local town (and believe me, I have been scouring the net), I'm there.