Is carbon-14 used for dating ? If so, would such bursts cause skewing in results?
A question like that can get you put into a rehabilitation camp.
Yes
If so, would such bursts cause skewing in results?
Yes. The Theory behind carbon-14 dating relies on a constant rate of upper atmosphere 14C generation, based on a constant flux of solar protons converting nitrogen-14 to carbon-14.
The Practice attempts to compensate for variations in proton flux by 14C dating samples of know ages and making a table of 14C dates Vs calendar dates.
This is further complicated by plants having species specific varying rates of 14C uptake.
The upshot?
Carbon-14 data provides a fairly accurate estimate of age, providing the sample isn't so old that all the 14C has decayed.