Satmar has apparently banned the consumption of strawberries due to insect infestation. The problem? Rabbis had to do tests to determine whether the insects, to small to be seen easily with the naked eye (actually, too small to be seen at all with the naked eye) were in the berries.
Remember, the original halakaha was made at a time when there were no optics – no eye glasses, laser surgery, microscopes or magnification. There were no micro filters, either.
Using the standards of even a few years ago, these berries are perfectly kosher.
The OU and CRC-Chicago have cleaning/checking procedures for strawberries. Basically, you cut off the green leafy stem, wash in soapy water, allow to rest for a few minutes in that soapy water, rinse well and eat. And even this is a humra compared to what Jews have done for thousands of years.