Travelling without a visa or work permit or other legal documents or crossing the borders in an irregular way is a bad decision. If you do not have all the legal documents you need for travelling abroad, you are putting yourself under big risk. If you cross borders without having a visa for the country you are entering, you are breaking the law.
There are criminal groups or intermediaries/agents operating and taking advantage of people who decide to travel illegally. If you seek help from such intermediaries or agents who sell information, services and documents to go abroad, you may not only go into debt on very harsh conditions. But very often you are also not told the truth and may end up in violent or exploitative situations.
Criminal groups or intermediaries may also promise a job or another good opportunity abroad. If this looks too good to be true, then it is not true. Migrants and refugees are especially vulnerable to trafficking in persons, a crime that exploits women, children and men for numerous purposes including forced labor and sexual exploitation.
These criminal groups can charge you a lot of money for your travel and may also put you under life threatening risks during the journey abroad. You may also not arrive at the agreed destination.
Other situations that can put you at risk
Even if you travel legally to another country but then overstay your visa or work permit, this makes you an irregular migrant. Remember that you will always be in a vulnerable situation without proper documentation or legal permit to stay in a foreign country.