Alex Griendling wrote an awesome blog post about the predilection of the design community to redesign something that they glance at and decide that they don’t like.  His post concludes with this, which I think applies to more than just design:

Were designers to simply offer their opinions on newly released identities or logos, that’d be one thing. Instead, by offering an opinion and an alternate solution that is presented as being better, we’re disrespecting the designer(s) that made the work while completely ignoring that the piece being critiqued went through the same process that we deal with every day. A little empathy towards work produced and, in turn, the designers that produce said work, would go a long way toward elevating the community’s discussion next time a redesign descends upon us.

It’s important to remember that, when you’re not involved with a project, you don’t know why design decisions were made, what constraints they were under, or what inputs they had to consider.  Coming in as an outsider, criticizing a design, and then presuming that you can create a new design in a day or two in a vacuum is a bad example of the design process, and it sets a bad precedent for all of us in user experience.