Yahoo Mail Accounts Only Accept Certain Attachments

It was announced that Yahoo Mail can now only accept certain attachments:

Acceptable Attachments:

Word Docs
Excel Docs
Power Point Presentations
Outlook Emails

Not-Acceptable Attachments:

Everything useful.
PDFs

Along with this announcement was also a quote that simply said: "Microsoft... we will ruin Yahoo... we will destroy the internet."

Microsoft then joined the dark side.