This is extremely dangerous! The skull emoji is used in unpleasant situations or to symbolize terrible things. Can stand for a real threat, but can also be used sarcastically or humorously.
The skull emoji was introduced in 2010 and released as part of the Unicode 11.0 standard. This emoji can be found under the smileys and emotions
category. Because the skull emoji has been around for quite some time, it should display correctly in the majority of operating systems.