SPF Unfriendly Companies

Quotes from Various companies about SPF

Gandi.net
If someone declare or use SPF records, he should be ready to lose messages. I won't be sad about this. SPF mean Stupid Policy Framework to me.

Destra.com (OzHosting.com)
I honestly don't care if this customer has stuffed up their SPF records, it's their problem and they can deal with it when they get bounces.