I'm wondering if posting links to youtube videos and blogspot blogs has the same auto-ping effect... I'll try it out and keep you all posted!
If anyone has any other methods that are used to ping links, let me know. I'm compiling a list of the best ways to get a new domain indexed without using the classic ping services. Bulk pinging just seems like it would throw a red flag to Google.
It is a good method but you should be aware of what you are sharing. Just like the OP said, if these links are low quality or keyword focused profile, social bookmarks, link networks. Google might flagged these links resulting to penalty.
I tried this today with a weebly site, site remains unindexed after share on personal account with many followers..
Worked great for me OP, thanks for sharing!