Phone Numbers in Display URLs?

Hello all,
I just recently had a discussion with a few of our account managers here in the office and I can't seem to find any definitive proof negating this theory other than my own thought that this technique appears awful spammy to me, and therefore would have a negative effect on your CTR and then, of course, the snowball effect has begun...The idea being that:

"You can put your phone number in your Display URL"

...if you haven't heard Google has recently stated that as of April 1st they are going to start flagging ad variations that put their phone numbers in the text. My first thought is "why would you even think of doing this when you can simply use the Call Extensions"?... my co-workers seem to be of the understanding that Google will not check the Display URL for phone numbers, and they are also telling me that Google Reps at the Help Center are telling them that putting the phone number in the Display URL will not be flagged come April 1st...So my questions to you all:

1. Does anyone else do this? Do you put a clients phone number in the Display URL? Why? Do you have any data to support doing this? why do this instead of using Call Extensions?

2. Do you think this is "spammy" looking? If you see the top three ad variations, and one has a phone number at the end of it's display URL (www.example.com/1-888-555-5555) would you not think this looks "spammy" and steer clear of it?

Thanks to all for your input here...